Noise reduction structure of two-stage compression screw main machine and two-stage compression screw main machine

• Main Authors: HAN WENHAN, CAI YONGQUAN, YAN SHANGKUN, LIN SIQIAO
• Format: Patent
• Language: Chinese; English
• Published: 03.11.2023
• Subjects: BLASTING; HEATING; LIGHTING; MECHANICAL ENGINEERING; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTMACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTPUMPS; WEAPONS

The utility model provides a noise reduction structure of a two-stage compression screw main machine. The noise reduction structure comprises a main machine shell, a second-stage bearing seat, a first cover plate, a second cover plate, a first noise reduction cavity pore plate, a second noise reduction cavity pore plate, a third noise reduction cavity pore plate and a fourth noise reduction cavity pore plate. A flow channel for first-stage compressed air to flow is arranged in the main machine shell, a first cover plate and a second cover plate are installed on the outer side wall of the flow channel, and the first cover plate and one outer side wall of the flow channel define a first noise reduction cavity, and the second cover plate and one outer side wall of the flow channel define a second noise reduction cavity. A first noise reduction hole plate is arranged in the first noise reduction cavity, the interior of the second noise reduction cavity is divided into two areas through a rib, and a second noise r